What is biomass energy ?

(a) What is the source of biomass energy ? (b) What is the composition of biogas ?

(a) What is biomass ? Give three examples of biomass. (b) Name the biomass which is still widely used as a source of heat energy in many households of our country.

What is biomass ? What can be done to obtain bio-energy using biomass ?

Which of the following is not an example of a biomass energy source ?

The biggest biomass of energy on Earth's surface is (a) Biomass (b) Solar radiations (c) Tides (d) Winds

Read the following statements regarding ecological pyramids and choose the correct answer . (a) Relationship between organisns at different tropic levels is expressed in terms of number , biomass and energy. (b) Any calculations of energy content, biomass or number has to include one group of organisms at that tropic level (c) In most ecosystems, all the pyramids of numbers , biomass , and energy are upright. (d) The pyramids of biomass in sea is generally inverted . (e) Pyramid of energy is always inverted and can never be upright.